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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2010-05-06 00:18:15 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-05-06 13:19:18 +1000 |
| commit | 292823814261e085cdcef06b6b691e6c2563fbd4 (patch) | |
| tree | 8c1eaebcf8f698ea13ac2a9291b9769abde1905e /security/tomoyo/gc.c | |
| parent | 2b9e4688fad8867b6e918610f396af3ab9246898 (diff) | |
| download | linux-292823814261e085cdcef06b6b691e6c2563fbd4.tar.gz linux-292823814261e085cdcef06b6b691e6c2563fbd4.tar.bz2 linux-292823814261e085cdcef06b6b691e6c2563fbd4.zip | |
TOMOYO: Use mutex_lock_interruptible.
Some of TOMOYO's functions may sleep after mutex_lock(). If OOM-killer selected
a process which is waiting at mutex_lock(), the to-be-killed process can't be
killed. Thus, replace mutex_lock() with mutex_lock_interruptible() so that the
to-be-killed process can immediately return from TOMOYO's functions.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/gc.c')
| -rw-r--r-- | security/tomoyo/gc.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c index d9ad35bc7fa8..245bf422e3a5 100644 --- a/security/tomoyo/gc.c +++ b/security/tomoyo/gc.c @@ -151,7 +151,8 @@ static void tomoyo_del_name(const struct tomoyo_name_entry *ptr) static void tomoyo_collect_entry(void) { - mutex_lock(&tomoyo_policy_lock); + if (mutex_lock_interruptible(&tomoyo_policy_lock)) + return; { struct tomoyo_globally_readable_file_entry *ptr; list_for_each_entry_rcu(ptr, &tomoyo_globally_readable_list, @@ -275,8 +276,6 @@ static void tomoyo_collect_entry(void) break; } } - mutex_unlock(&tomoyo_policy_lock); - mutex_lock(&tomoyo_name_list_lock); { int i; for (i = 0; i < TOMOYO_MAX_HASH; i++) { @@ -294,7 +293,7 @@ static void tomoyo_collect_entry(void) } } } - mutex_unlock(&tomoyo_name_list_lock); + mutex_unlock(&tomoyo_policy_lock); } static void tomoyo_kfree_entry(void) |